Xi'an Shew-E Steel Pipe Co.,Ltd is one of the leading ck45 honed pipe suppliers and also a famous such manufacturer,Website: , equipped with many professional ck45 honed pipe factories, welcome to purchase high quality ck45 honed pipe from our company.Standard:DIN172000Materials: CK45Technical: cold-draw seamlessDelivery Condition:BK.BKW,BK+S,GBK,NBKStraightness: 0.5mm/1m max for tubes below 3m,0.8mm/1m max for tubes between 3 to 6m, 1.2mm/1m for tubes above 6mTechnology:honed & SRB(Skived and Roller Burnished).Application: used in the hydraulic cylinder of the Heavy Machinery, Cranes, Excavator and Forklifts.etcTolerance：Honed: